A Warning - p482

doi:10.1038/scientificamerican12251909-482

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Electrification of a Chicago Railway Terminal - p482

doi:10.1038/scientificamerican12251909-482a

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Report of the Naval Bureau of Ordnance - p482

doi:10.1038/scientificamerican12251909-482b

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The Army Ordnance Report - p482

doi:10.1038/scientificamerican12251909-482c

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The Origin of European Peoples - p482

doi:10.1038/scientificamerican12251909-482d

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Engineering - p483

doi:10.1038/scientificamerican12251909-483

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Electricity - p483

doi:10.1038/scientificamerican12251909-483a

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Science - p483

doi:10.1038/scientificamerican12251909-483b

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A New Theory of the Screw Propeller - p484

doi:10.1038/scientificamerican12251909-484

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A Machine for Simultaneously Firing Many Blasts - p484

Frank C. Perkins

doi:10.1038/scientificamerican12251909-484a

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A Pollen-Gathering Patent Dedicated to the Public - p485

doi:10.1038/scientificamerican12251909-485

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Photographing a Star Spectrum - pp485 - 486

S. A. Mitchell

doi:10.1038/scientificamerican12251909-485a

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The Phases of Venus - p486

Frederic R. Honey

doi:10.1038/scientificamerican12251909-486

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An Aerial Passenger Railway - p488

Roland Ashford Phillips

doi:10.1038/scientificamerican12251909-488

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How Your Eyeglasses are Made - pp489 - 490

C. H. Claudy

doi:10.1038/scientificamerican12251909-489

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Flight with Flapping Wings - p490

doi:10.1038/scientificamerican12251909-490

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The Baby Musk Ox and the Alaskan Bear of the New York Zoological Gardens - p491

Walter L. Beasley

doi:10.1038/scientificamerican12251909-491

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